Insulated support for electrical conductors



L. STEINBERGER AND G. HlLL. INSULATED SUPPORT FOR ELECTRICAL CONDUCTORS. APPLICATION HLEU JAN.1?, 918.

Patented J une 1, 1920.

A z? 2 INVENTORS 4 M f/XE/ 1 V A ATTORNEY LOUIS STEINBERGER AND GUY HILL, OF BROOKLYN, NEW YORK.

INSULATED SUPPORT FOR ELECTRICAL CONDUCTORS.

Specification of Letters Patent.

Patented June 1, 1920.

Application filed January 17, 1918. Serial No. 212,324.

To all whom it may concern:

Be it known that we, LOUIS STEINBERGER and GUY HILL, citizens of the United States, and residents, respectively of the borough of Brooklyn, county of Kings, State of New York, have jointly invented certain new and useful Improvements in Insulated Supports for Electrical, Conductors, of which the following is a specification.

Our invention relates particularly to insulated inductance coils in radio apparatus.

One of the objects is to provide a mount ing for the inductance coil constructed entirely of insulating material and which is rigidly and intimately secured to said inductance coil throughout the length of the coil.

Another object is to combine a mounting of insulating material with the inductance coil in such fashion as to secure the coil rigidly to the insulating material at a single molding operation.

Another object is to provide means for rigidly securing the inductance coil to a support of insulating material, the embedded portions of the volutes of the coil being separated by the insulating material.

Another object is to provide a coil of such shape that it may be readily and efliciently mounted upon the insulating support, the projecting portion havin a larger crosssectional area than that o the embedded or anchoring portion, so as to have a great amount of electrical carrying capacity.

Another object is to ive the inductance coil such configuration t at when one edge is embedded in the insulating material it will provide an undercut portion thereby affording a good anchorage in the insulating material, the exposededge of the coil being at the same time also provided with an undercut portion, thereby affording a good gripping surface of the sliding contact member. Owing to the undercut portion, the sliding contact member cannot become disconnected from the exposed ed e of the coil even though the apparatus be greatly jarred or shaken up from the rolling of the ship or from any cause whatever.

Another object is to fashion the anchoring portion so as to form static shields thus reducing to a minimum the effect of a brush discharge.

Other objects will appear hereinafter from the specification and claims.

Referring to the drawings, in which similar characters indicate the same parts in the several views;

Figure 1 is a plan view of an insulating support and an inductance coil secured thereto embodying our invention.

Fig. 2 is a section on line 2-2 of Fig. 1 coils being shown secured to both sides of the support.

Fig. 3 is an enlarged section broken away showing the mounting of the coil in the insulating support on one side only thereof. I

Fig. 4 is a fragmentary view partly in section showing another form of coil and means for permanently securing the coil to the insulating support.

Our invention herein shown and described may be applied to any convenient form of sup ort, and we have shown as illustrative o the support a disk or plate S of solid insulating material.

In the embodiment of our invention the coil O is not limited to any particular form or shape of metal strip, and we have thus illustrated two shapes of strips as shown respectively at O and C in the several views of the drawing.

Our invention contemplates not only the securing of the coil upon one side of the insulating plate, but also on both sides of the plate as illustrated in Fig. 2.

The insulating material used in the construction of this invention may be of any suitable material of that nature but we prefer to use the insulating material which is known in the art as electrose.

The strip from which the inductance coil is formed is made of metal of any suitable kind or metallic alloy. We have found that a very efficient coil may be formed, as illustrated in Figs 2 and 3, from wire which is commonly known as trolley Wire, the cross-section of which has a figure eight shape. In other words the upper and lower edges of the metal strip or wire are enlarged as at 10 and' 11 respectively, and these enlargements are connected by a strip of metal as at 12 of less width than the metal at the edges.

This form of wire is particularly suited for our present invention because one edge 11 is so shaped as to be readily molded into the insulating material at one operation, and thereby held securely and firmly to the insulating material and the outer or exposed edge 10 is also so shaped that it may e readily clamped by a contact when the inductance coil 15 mounted for use, as for instance, in a radio apparatus. The exposed edge is also of larger cross-sectional area than the embedded or anchoring edge and thus has a maximum electrical conductivity.

The embedded'edge, because of the o )po sitely projecting rounded edges 20 and 21, have the function and effect of a static shield because of the oppositely disposed volutes of the coil, and thus minimize the effect of a brush discharge from the metal where it enters the insulating material, that is, brush discharge between turns over the surface of the insulating material. The rounded edge also revents brush discharge from the embedde ed e of the coil.

Another form of coi and means for permanently securing the coil C to the insulating material is shown clearly in Fig. 4 where the sides at the lower edge of the metal ribbon or strip are provided with irregular or mutilated surfaces 30 so that in molding the coil to the insulating material the coil is permanently and securely anchored thereto.

As changes of construction could be made within the scope of our invention, it is intended that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limitin sense.

Having now descri ed our invention, what we claim as new and desire to secure by Letters Patent is:

1. In a device of the kind described, a

late or disk supporting element of insulatmg material, a metal coil molded at an edge thereof to a face of the said supporting ele' ment, the cross-section of the coil having an irregular area, the insulating supporting element being coextensive with one edge of the sairal coil.

2. n a device of the kind described, a single support ofinsulating material, metal coils molded at their edges to each face of the support.

In a device of the kind described, a support of insulatin material, a metal coil consisting of a wirediaving a figure 8 cross section, said wire being coiled and molded in the face of said support to a depth substantially equal to the diameter of one of the enlar ed portions of the metal wire.

4. In a device of the kind described, a support of insulating material, a coil of metal of a figure 8 cross section molded at one edge to a face of the insulating support to an cxlent that the insulating material substantially surrounds one of the curved portions of the wire.

5. In a device of the kind described, a support of insulating material, a wire of figure 8 cross section molded thereto at one edge, substantially one half of the wire being surrounded by insulating material and the other half projecting from the insulatmg support.

6. In a device of the kind described, a support of insulating material, a metal strip molded thereto at one edge, one of the edges having a greater area in cross section than the other edge, the edge havin r the greater area in cross section projecting rom the sur face of the insulating support and'the edge of lesser cross section being molded within the surface of the support.

7. In a device of the kind described, a unitary base of insulating material, a coil consisting of a strip of metal molded throughout its length into the surface thereof at one edge, the cross section of the coil having an irregular shape, the said base being co-extensive with one edge of the coil.

8. In a device of the kind described, a unitary base of insulating material, and a spiral coil consisting of a strip of metal molded throughout its length into the shrface thereof at one edge, the cross section of the coil having an irregular shape, one edge of said spiral coil being co-extensive with the unitary base.

9. In a device of the kind described, an agglomerate supporting base of insulating material, a metallic coil of figure 8 cross section embedded in said supporting base to a point of minimum cross section.

10. In a device of the kind described, an agglomerate supporting base of insulating material, a metallic coil of figure 8 cross section molded in said supporting base to a point of minimum cross section.

11. In a device of the kind described, an agglomerate supporting base of insulating material, it rolled wire coil of figureB cross section molded in said supporting base to a point .of minimum cross section.

In witness whereof we have hereunto set our hands at the borough of Manhattan, city and State of New York, this 31st day of December, 1917.

LOUIS STEINBERGER. GUY HILL.

In presence oflearner. R. RICHARDS,

C. C. BILLINGS. 

